Door handle connection



April 7, 1970 P. JUNGHANNS 3,504,939

noon HANDLE CONNECTION v Filed April 968 2 5 3 Sheets-Sheet 1 FIG. I

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April 7, 1970 P. JUNGHANNS DOOR HANDLE CONNECTION 3 Sheets-Sheet 2 Filed April 24, 1968 FIG.7

United States Patent 01 ice 3,504,939 DOOR HANDLE CONNECTION Paul Junghanns, Dusseldorf, Germany, assiguor to Wilhelm Engstfeld, Dusseldorf, Germany, a corporation of Germany Filed Apr. 24, 1968, Ser. No. 723,838 Claims priority, applicatigsn ffisezrmany, Apr. 25, 1967,

Int. Cl. EdSb 3/04 US. Cl. 292--354 7 Claims ABSTRACT OF THE DISCLOSURE The present invention relates to a door handle connection, in general, and to such door handle connection with a pressure screw disposed in the pusher shaft, which pressure screw abuts a coupling element disposed in the pin of the other handle and urging into the wall of the pin entering opening, in particular.

It is known to design a door handle connection in such a manner, that the handle pin is equipped with outwardly directed barbed hooks, which enter and sink in respectively, into the material of the handle neck (Patent No. 803,881 of the West German Republic). The barbed hooks consist thereby of resilient material and assume their full effect only upon withdrawing the handle from the pin. Furthermore, it is also known, in connection with a door handle connection (Patent No. 1,088,386 of the West German Republic), to provide in a recess of the pin a blade spring bent in its cross plane as a coupling element, against the apex of which is engaged supportingly a set screw radially insertable into the handle neck. The connection rigidity obtained thereby is limited by the few measurements which are available and the mounting requires a strong tightening of the set screw.

It is, therefore, one object of the present invention to provide a door handle connection of the described type, in which by forming a simplest producible stabile coupling element, the pressure screw is released and, nevertheless, an extremely increased digging effect is brought about.

It is another object of the present invention to provide a door handle connection, wherein the coupling element is designed as a double lever extending in longitudinal direction of the handle pin, the longer arm of the double lever, extending opposite of a support, is engaged by the pressure screw and the shorter lever arm forms upwardly directed digging teeth.

3,504,939 Patented Apr. 7, 1970 This arrangement renders possible in an advantageous manner a selective determinable lever transmission of the pressure force, so that without displacement play concerning the axial engagement, the digging force is accommodated to the door handle metal, as well as the digging depth can be determined. The safety of this digging is thereby independent from the operation of the laborer performing the mounting and the rotating-in of the pressure screw takes place simply always up to the full abutment of the long lever arm in the recess of the handle pin. The production of the required structural elements is extremely advantageous, since the double lever is produced as a stamped out part and the pin requires merely a longitudinal slot, whereby it is only slightly weakened and an appreciable reduction of the manufacturing cost is brought about.

7 If the double lever is formed resiliently, in accordance with the present invention, one obtains advantageously a loosening security of the digging-in due to the stored spring force.

In order to save the pressure screw also from a larger self-loosening return rotation, it is of advantage, that the longer lever arm of the double lever is formed elastically resilient.

It is possible, furthermore, to obtain a favorable exploitation of the pressure screw force for the pin suggesting in the square recess of the handle pin, by arranging the double lever in a plane extending through two diagonally oppositely disposed edges of the square pin. A very effective security against axial tensile load of the door handle in use results in a design, wherein the upper edge of the lever extends in its tensioned position by widening upwardly towards the free end of the pin.

It is further of effective advantage thereby, for the security of the pressure screw, as well as for the selfclamping in case of a tensile load, if, in accordance with the present invention, the pressure screw is disposed in a -oblique position to the wedge angle of the lever arm being in the tensioned position in the handle shaft.

. In order to avoid a falling out of the double lever during the mounting or prior thereto, in accordance with the present invention, two double levers engaged by a pressure screw are disposed next to each other in the recess of the handle pin, such that due to slight separation of the double lever, a resilient adherence thereof on the walls of the recess is obtained.

In accordance with the present invention, the double lever can also, with the same advantage, be retained in the recess by means of edge impressions.

For avoidance of a displacement of the double lever in axial pin direction, in accordance with the present invention, the double lever has an upwardly directed supporting loop with rounded bottom edge which engages tightly in a coordinated hollowing at the bottom of the pressure pin recess.

In order to form a reserve digging in case of light metal door handles for the digging in of the teeth in an advantageous manner, in accordance with the present invention, the double lever has two digging teeth disposed in series relative to each other.

One can finally also, in accordance with the present invention, in order to bring about the same digging-in effect, form the lever arm as a convex extending 'blade spring anchored on the opposite side of the pressure screw and arranged convex on the longer lever arm in the direction of the pressure screw, which forms with a reversed curve apex the support from which an upwardly directed arm extends into the digging-in teeth.

With these and other objects in view which will become apparent in the following detailed description, the present invention will be clearly understood in connection with the accompanying drawings, in which:

FIGURE 1 is a top plan view of a door handle connection designed in accordance with the present invention;

FIGURE 2 is a longitudinal section of the door handle connection at an enlarged scale in non-tensioned position;

FIGURE 3 is a longitudinal section of the door handle connection as shown in FIGURE 2 in its tensioned position;

FIGURE 4 is a section along the lines 44 of FIG- URE 2;

FIGURE 5 is a section along the lines 5-5 of FIG- URE 3;

FIGURE 6 is a top plan view of the pin with a particular embodiment of the double lever;

FIGURE 7 is a longitudinal section of the connection indicating a resilient design of the double lever;

FIGURE 8 is a longitudinal section of another embodiment of the door handle connection with a double lever designed as a blade spring;

FIGURE 9 is a section along the lines 99 of FIGURE 8 in non-tensioned position; and

FIGURE 10 is a section likewise along the lines 99 of FIGURE 8 in tensioned position.

Referring now to the drawings, and in particular to FIGURES 1-5, the door handle 1 has in a handle neck 2 a square recess 3, in which a handle pin 4 is inserted. In the handle neck 2 is arranged a set screw 5 which is screwable in radial direction.

The handle pin 4 has a narrow longitudinal slot 6 extending through at about one half of the pin. The slot 6 is disposed in a plane extending through two diagonally opposite edges of the square pin (FIGURES 4 and 5). In the longitudinal slot 6 is arranged a double lever 7 serving as a coupling element and extending in longitudinal direc tion of the handle pin 4. The longer lever arm 7' extending on the opposite side of a support 8 of the double lever 7 preferably stamped out of steel, sheet metal is engageable by the set screw 5. For this purpose the square pin is equipped with a cross recess 9.

The support 8 is formed by an upwardly directed loop or recess 7" with rounded bottom edge. A hollowing complementary thereto is provided at the bottom of the slot 6.

The short lever arm 7" forms due to a corresponding design upwardly directed teeth 11 and 12, respectively. Thus, two digging-in teeth disposed in series relative to each other in the axial direction of the pin 4 are arranged,

which are disposed at different distances from the rotary center point of the lever and dig-in correspondingly deep with a corresponding force.

The double lever 7 is stiff due to its edge cross section. In order to bring about an advantageous tension effect, the longer lever arm 7' is formed resiliently by corresponding formation, for instance, as shown in the drawing. A particularly great elastic resiliency is brought about by the embodiment disclosed in FIGURE 7 of the drawings, in which at the lower edge of the lever arm 7 recesses 13 are arranged, which favor an elastic bending of the lever arm The double lever 7 can also, as shown in FIGURE 6, comprise two equal, thin walled pieces 7a and 7b, which bring about, due to an easy separation, a resilient adherence on the walls of the slot 6. At the short lever arm above the support 8, the upper edge of the double lever 7 is equipped with a recess 14, into which enter the edge-side impressions 15 of the slot 6 and secure the lever against falling out. At the tail end of the long lever arm 7 is likewise a correspondingly effective impression 16 provided.

The operation of the described door handle connection is as follows:

The handle 1 can, in accordance with FIGURE 2, be slipped on to the handle pin 4. Thereafter, the set screw 5 is screwed in. The double lever 7 is thereby turned into the position shown in FIGURE 3, whereby the arm 7' abuts the bottom of the slot 6. The teeth 11 and 12 formed on the shorter lever arm 7" dig-in, with especially greater force corresponding to the lever ratio, as shown in FIG- URE 5, into the walls 3' of the recess 3.

The upper edge of the lever 7 extends in tensioned position (FIGURE 3) towards the free end of the pin 4, in an upward tape. This brings about a protection against the removal of the handle 1 from the pin. Preferably the set screw 5 is disposed in an oblique position of about to the wedge angle a of the lever arm position in the handle shaft 2.

A similar equal formation of the handle connection is disclosed in FIGURES 8-10. Here, the lever 7 is formed as a blade spring 70 anchored in the handle pin 4 by means of a bent over arm 17 in the bottom of the slot 6 on the opposite side of the set screw 5. Along the longer lever arm, the blade spring runs bent convex in the direction of the set screw 5. With a reversed curved arm 18, the blade spring 70 forms the support or bearing, from which an upwardly bent arm 19 extends into the digging-in teeth 20.

While I have disclosed several embodiments of the present invention, it is to be understood that these embodiments are given by example only and not in a limiting sense.

I claim:

1. A door handle connection with a pressure screw disposed radially in a door handle comprising a two-armed lever having a longer and a shorter arm,

a handle-four-edge pin having a longitudinal slot,

said shorter arm of said double lever having edge projections,

said two-armed lever being supported near one end in said slot of said handle-four-edge pin,

a set screw disposed in said door handle and exerting pressure on said longer arm of said double-armed lever, as well as turning said lever, whereby said edge projections of the shorter arm of said lever engage the inner wall of said door handle, and

said slot being disposed in a plane extending through two diagonally opposite edges of said handle-fouredge pin and defining a bottom supporting said twoarmed lever.

2. The door handle connection, as set forth in claim 1,

wherein said pin has a cross recess disposed below said set screw,

and

said longer arm of said twoarmed lever extends within the range of said recess.

3. The door handle connection, as set forth in claim 1, wherein said shorter arm of said two-armed lever has at its upper edge at the free end gripping teeth, which penetrate symmetrically into oblique faces of the walls of said pin upon turning said two-armed lever by means of said set screw.

4. The door handle connection, as set forth in claim 1, wherein at least said longer arm of said two-armed lever is elastically resilient.

5. The door handle connection, as set forth in claim 1, wherein said two-armed lever has an upwardly directed supporting loop with a round bottom edge, and

said supporting loop engages in a complementary manner the support recess at the bottom of said pin.

6. The door handle connection, as set forth in claim 4,

wherein said two-armed lever is retained in said slot by edge-sided impressions of said pin.

5 6 7. The door handle connection, as set forth in claim 1, FOREIGN PATENTS f 927,300 5/1963 Great Britain.

sa1d two-armed lever 15 elastic and is supported spaced 1,013,990 8/1967 Germany. apart from said set screw, 1,813,444 6/1958 Germany said longer arm of said two'armed lever is convex in 5 1,900,125 2/1964 Germany.

the dlrectron of said set screw,

said two-armed lever forms with a reversely curved bow MARVIN CHAMPION, Primal-y Examiner said support, and

an p ardly directed arm extends from said support into E MCCARTHY, ssistant Examiner gripping teeth.

References Cited 10 X- UNITED STATES PATENTS 287-53 1,026,497 5/1912 Crouch 292355 

